(A)(1) ARM boulder retrieval is most extensible to a Deimos boulder retrieval mission

(A)(2)Deimos is Higher in the Mars gravity well so a shorter mission timeline for a SEP

(A)(3) Bring back the Demos boulder to a lunar Lunar DRO

(A)(4) Fly Orion to Deimos boulder DBRM

(B)(1) Deimos boulder retrieval is most responsive to decadal survey needs as small body solar system evolution (SBAG) and its this that justifies using the SMD budget for 1/3rd of the mission costs (decadel survey concerns)

(B)(2) DBRM is directly extensible to prepositioning SKYLAB-II(2) at Deimos after prepositioning SKYLAB-II(1) at EML-1

Jon Goff suggests the same sort of sort of idea here a talking point # 4 . Jon talks science with ARM at Phobos and Deimos and this is precisely what the decadal survey is looking for with its SBAG committee.Jon speaks of ISRU from Martian moons a great idea! http://forum.nasaspaceflight.com/index.php?topic=32060.180